Boiler



Patented a. 25, 1927.

1 UNITED STATES JOHN H. BAKER, or DETROIT, MICHIGAN.

BOILER.

Application filed December 11, 1923. Serial No. 679,936.

My invention relates toa new and useful improvement in a boiler adapted for use particularly with vehicles in which steam is used as thedriving power, and has for its object the provision of a boiler of this class which will besimple in structure, economical of manufacture and highly efficient in use. r

Another object of the invention is the provision of a boiler of this class which will possess a maximum amount of flexibility.

Another objectof this invention is the provision .of' a boiler having water tubes mounted in sections which may be removed and replaced at'will, thus regulatingthe capacity of the boiler without disturbing the frame work or foundation of the boiler.

Another objectfof the invention is the provision of headers connected to a steam dome and carrying water tubes which are bellied or formedsinuous intermediate their. ends to provide for the expansion and contraction of the tubes under different conditions of temperature so as to prevent injury to the boiler because of variations in temperature. p Other objects will appear hereinafter.

The invention. will be best understood" froni a reference to the accompanying drawings which form a part of this specification and in which,

Fig. 1 is an end elevational view of. the invention, v Fig. 2 is a side elevational view ofthe invention,

Fig. 3 is a top plan view of the invention, and, r v

Fig. 4 is a sectional view taken on sub stantially line l-4i of Fig. 1. I

The invention in its preferred form comprises a plurality of sections, each section having a header 7 and a head-er 8 connected with pipes having the portions 9 and 1O bent as at 11. If desired these pipes may be formed with a number of bonds intermediate their lengths to provide asinuous arrangement. Projecting from each end of the headers 3 are nipples 12 which are connected toia pipe 13 by means of a union 14, the pipes 13 being curved as shown and attached in communication with a steam dome 15. These domes are positioned over the headers 8, and additional domes 16 and 17 are also positioned on the headers 8. These several domes are connected to each other by means of the pipes 18, 19 and 20, the steam outlet pipe 21 being connected to the pipe 19.

Supporting the headers is a frame or housing 22 in which is positioned a suitable heating element 23 having a pilot element 24,; the structure of theheatingelement bemg no part of this invention and therefore not described in detail. Heating elements in boilers of .thisclass are well known.

being provided with a pipe, 26, havingan angularly turned portion 27 and coupled to a nipple which projects from the header 7 by means of a coupling 29. One of these pipes is provided for each header and serves to connect each header in communication A safety valve 30 is connected toone of the steam domes,and a drain pipe .31 is HE- tached to the steam dome and to the feed water pipe 25. As shown in Fig. 1 the pipes connecting the headers are staggered relatively to adjacent headers that the hotg'ases passing from the heating element are deflected by the water tubes.

In use anynumber of sections, within the 'capacity'of the steam domes and water feed pipes may be used, the removal or replacement of the sections being a very easy and simple operation, owing to the method of attaching the sections to the domes and the feed pipe. In'this way the capacity of the boiler may be regulated with a resultantsaving of fuel in operation. The entire structure of the boiler and particularly the bending of the water tubes, as shown, renders a maximum amount of flexibility to the boiler, which is highly desired in boilers of this class and used for this purpose. The staggering of the tubes. of adjacent sections also affords a greater heating surface coming into direct contact with the hot gases.

WVhile I have illustrated and described the preferred form of structure I do not wish to limit myself to the details of structure set forth but desire to avail myself of such variations and modifications as come within the scope of the appended claims.

Having thus described my invention what I claim as new and desire to secure by Letters Patent is: v 1. A sectional boiler of the class described,

A water feed pipe 25 is provided, this pipe 25 comprising a row of steam domes, adjacent domes being connected in con'imunication with each other; a feed water pipe; a plurality of headers extending transversely of said domes and arranged in sets of pairs,'the upper header of each pair being in close proximity to said domes, and the other being spaced therefrom; a plurality of bow-shaped pipes connecting the headers in'each set; in dividual connection between each of the lower headers and said feed water pipe; and individual connection for each end of each of the upper headers connected to the outermost of said domes.

2. A sectional boiler of the class described, comprising a row of steam domes, adjacent domes being connected at one end in com munication with each other; a feed water pipe; a plurality of headers extending transversely of said domes and arranged insets of'pairs, the upper header of each pair being in close proximity to said domes and the other being spaced therefrom; a plurality of bow-shaped pipes connecting the headers ineach set; an individual connection between each of the lower headers and said feed water pipe; and an individual substantially U-shaped connection for each end of each of the upper'headers connecting to the outermost of said domes.

3. A sectional boiler of the class described domes, being connected in communication with each other at one end. with a substantially U-shaped connecting member; a

feed water pipe; a plurality of headers extending transversely of said domes and arranged 1n sets of pairs, the upper header of each pair serving as a support for said domes and the other headerbeing spaced therefrom; a plurality of bow-shaped pipes connecting the headers in each set; an individual connection between each of the lower headers and said feed water pipe; a substantiall U-shaped individual connection for each end of the upper headers connectcomprising a plurality of steam domes arranged in parallel relation to each other, adjacent domes beingconnected at one end in communication with each other; a plurality of headers extending transversely of said domes and arranged in sets of pairs, the upperheader of each pair being in close proximity to said domes, and the lower header in each air being spaced therefrom; a plurality 0% bow shaped )ipes connecting the headers in each set; a feed pipe; a pipe for connecting each of said lower headers individually with said feed pipe,said connecting pipes having their axes in the same vertical plane as the axis of the headers with which connected; and an individual substantially U shapedconnection' for each end of the upper headers connecting said headers individually to the outermost of said domes, said U shaped connections lying in the vertical axial plane of said headers, the upper headers being Ifree from direct connection with each other, and the lower headers being free from direct connection with each other. 7 a

In testimony whereof I have foregoingspecification, a

1 JOHNH. BAKER.

signed the 

